package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * @author 常红伟
 * 课程模块Dao的实现类
 */
public class CourseDaoImpl implements CourseDao {

    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QueryRunner对象
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql   判断是否删除 取出is_del=0的数据 代表未删除的数据
            String sql = "select id,course_name,price,sort_num,status from course where is_del = ?";

            //3.执行查询
            List<Course> courseList = queryRunner.query(sql, new BeanListHandler<Course>(Course.class), 0);

            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public List<Course> findByCourseNameAndStatus(String courseName,String status) {
        try {
            //1.创建QueryRunner对象
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql
            StringBuffer sql = new StringBuffer("SELECT id,course_name,price,sort_num,STATUS FROM course WHERE 1=1 and is_del = ?");

            //2.2创建List保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);

            //2.3判断传入参数是否为空
            if (courseName!=null && courseName!=""){
                sql.append(" AND course_name LIKE ?");

                //like查询需要拼接%
                courseName = "%"+courseName+"%";
                //将条件放入list集合
                list.add(courseName);
            }

            if (status!=null && status !=""){
                sql.append(" AND STATUS = ?");
                //将status转换为int
                int i = Integer.parseInt(status);
                list.add(i);
            }
            //执行查询
            List<Course> courseList = queryRunner.query(sql.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return courseList;
        } catch (Exception e){
            e.printStackTrace();
            return null;
        }

    }

    @Override
    public int saveCourseSalesInfo(Course course) {
        //1.创建QueryRunner对象
        QueryRunner queryRunner = null;
        try {
            queryRunner = new QueryRunner(DruidUtils.getDataSource());


        //2.编写sql
        String sql = "INSERT INTO course(\n" +
                "course_name,\n" +
                "brief,\n" +
                "teacher_name,\n" +
                "teacher_info,\n" +
                "preview_first_field,\n" +
                "preview_second_field,\n" +
                "discounts,\n" +
                "price,\n" +
                "price_tag,\n" +
                "share_image_title,\n" +
                "share_title,\n" +
                "share_description,\n" +
                "course_description,\n" +
                "course_img_url,\n" +
                "STATUS,\n" +
                "create_time,\n" +
                "update_time\n" +
                ")VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

        //3.准备参数
        Object[]param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(), course.getTeacher_info(),course.getPreview_first_field(),
                course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),
                course.getShare_title(),course.getShare_description(),course.getCourse_description(),course.getCourse_img_url(),course.getStatus(),
                course.getCreate_time(),course.getUpdate_time()
        };

        //4.执行查询
        int i = queryRunner.update(sql, param);
        return i;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }

    }

    @Override
    public Course findCourseById(int id) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());
            String sql = "SELECT id,course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS\n" +
                    "FROM course WHERE id= ?";
            Course course = queryRunner.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());
            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ? \n" +
                    "WHERE id = ?";
            Object[]param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(), course.getTeacher_info(),course.getPreview_first_field(),
                    course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),
                    course.getShare_title(),course.getShare_description(),course.getCourse_description(),course.getCourse_img_url(),course.getUpdate_time(),course.getId()
            };
            int row = queryRunner.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }


    }

    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());
            String sql = "update course set status = ?,update_time=? where id =?";

            Object[]param = {course.getStatus(),course.getUpdate_time(),course.getId()};

            int row = queryRunner.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }

    }
}
